To update here I've worked down past the IKMOS stock BLM table and 1st is now at about 1.7, 2nd about 2 or so, 3rd tapered from 2.5-3, and 4-6 are at 3.0. My boost curve is now linear, and butt dyno says hp/tq ramp is more linear as we would expect with NA delivery (what I want). However, while this N53 head with HP800s don't just instantaneously blow the tires off anymore, I still seem to need an actual boost by gear control.
The BLM by gear doesn't seem to actually limit boost in a near normal range. See also: I'm still hitting 17-18 psi in first with a BLM of 1.7. stock IKMOS would be ~2.3. I seem to lose traction at around 7-8psi or SOMEWHERE along MAF 2-300 in first, and maybe 11-12psi in second. With BLM set the way it is there's a ton of warning and noise from the rear tires before they let go, so both by logs and chassis feel/feedback this experiment has worked.
TLDR;
- BLM seems to alter the slope of the boost onset curve,
- BLM doesn't seem to restrict the limit despite the name Caveat I'm targeting 16-18psi (~200 load) with the N53 head.
- I will now start tapering load by gear and WGDC fine tuning to try to address this
- Once load is addressed I believe next step will be to look at timing curves to watch for small pulls indicating low levels of traction intervention.
- not mentioned above but I also found the torque request and throttle sensitivity tables critical to usability of first gear. Probably has more to do with my 3.46 FD.
Cheers!